package main

import (
	"fmt"
	"time"
)

func main() {
	p := fmt.Println
	//We’ll start by getting the current time.

	now := time.Now()
	p(now)
	//You can build a time struct by providing the year, month, day, etc. Times are always associated with a Location, i.e. time zone.

	then := time.Date(
		2009, 11, 17, 20, 34, 58, 651387237, time.UTC)
	p(then)
	//You can extract the various components of the time value as expected.

	p(then.Year())
	p(then.Month())
	p(then.Day())
	p(then.Hour())
	p(then.Minute())
	p(then.Second())
	p(then.Nanosecond())
	p(then.Location())
	//The Monday-Sunday Weekday is also available.

	p(then.Weekday())
	//These methods compare two times, testing if the first occurs before, after, or at the same time as the second, respectively.

	p(then.Before(now))
	p(then.After(now))
	p(then.Equal(now))
	//The Sub methods returns a Duration representing the interval between two times.

	diff := now.Sub(then)
	p(diff)
	//We can compute the length of the duration in various units.

	p(diff.Hours())
	p(diff.Minutes())
	p(diff.Seconds())
	p(diff.Nanoseconds())
	//You can use Add to advance a time by a given duration, or with a - to move backwards by a duration.

	p(then.Add(diff))
	p(then.Add(-diff))
}
